A chlorine tablet chlorinator vacuum evacuation system for attaching to a chlorine tablet chlorinator used in a potable water system. The chlorine tablet chlorinator vacuum evacuation system is continuously running to remove chlorine gas as it is liberated from calcium hypochlorite, sodium dichloroisocyanurate, or trichloroisocyanuric acid tablets so that a back pressure event does not expel chlorine gas to the inside of a human occupyable space. The chlorine tablet chlorinator vacuum evacuation system is reliable in that all of the components are resistant to the oxidizing effects of chlorine gas. The apparatus comprises an upper body joined to a lower body secured by a plate fastened to both flanges of the upper and lower body. The upper body has a vacuum port and a discharge port. The lower body has a nozzle and a centrally located cone assembly creating a venturi effect with air movement.